Function getNetraJeeva

getNetraJeeva(
nakIdx: number,
sunNakIdx: number,
): { jeeva: number; netra: number }
Calculate Netrama (Eyes) and Jeevanama (Life Force).

Fine-grained indicators of the 'vitality' of the day based on the angular distance (counted in nakshatras) between the Moon and Sun at sunrise.
Parameters
- nakIdx: number
  Current Moon Nakshatra (28-system)
- sunNakIdx: number
  Current Sun Nakshatra (28-system)
Returns { jeeva: number; netra: number }
Numerical scores for spiritual visibility and metabolic force.